# TEST\_BTC transfer issue for sandbox

**URL:** <https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167>\
**Category:** Support\
**Created:** [July 4, 2024, 9:07am UTC](https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167 "2024-07-04T09:07:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![MaxS](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@MaxS](https://community.fireblocks.com/u/MaxS)\
**Post date:** [July 4, 2024, 9:07am UTC](https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167/1 "2024-07-04T09:07:30Z")

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Hi I have developer sandbox account.  
I’m trying to test transactions with the BTC\_TEST.

The balance - **0.003785** BTC\_TEST  
I try to send - **0.003** BTC\_TEST(to ONE\_TIME\_ADDRESS)  
Fee - **1014.67** sat  
Fireblocks transaction ID - **b0cabe49-b75c-4513-86e0-d0df192dd74b**

But I have this error - **Not enough fund for the fee of the requested transaction**

I’ve tried with different amounts and different fees. The result is the same for me.

Could you please suggest what is wrong here?  
Thanks in advance.

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**Author:** ![mnamakwala](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@mnamakwala](https://community.fireblocks.com/u/mnamakwala)\
**Post date:** [July 5, 2024, 11:07pm UTC](https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167/2 "2024-07-05T23:07:49Z")

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Hi Max,  
The fee required for the transaction is 0.01252110184. Hence, it failed with insufficient funds for fees. Please try a smaller amount.  
Thanks

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<div class="post-metadata">

**Author:** ![MaxS](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@MaxS](https://community.fireblocks.com/u/MaxS)\
**Post date:** [July 8, 2024, 9:22am UTC](https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167/3 "2024-07-08T09:22:06Z")

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Hi @mnamakwala  
Thank you for checking it out for me.  
I’ve initiated 2 more transactions - but the result is the same  
One with **0.001** BTC\_TEST  
Fireblocks transaction ID - **267ed8b3-9511-4c74-b2c1-69f99a841ba8**  
The second one with **0.0001** BTC\_TEST  
Fireblocks transaction ID - **adbb5060-a12e-4314-b4f8-b7b4ff1c91e3**

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**Author:** ![mnamakwala](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@mnamakwala](https://community.fireblocks.com/u/mnamakwala)\
**Post date:** [July 8, 2024, 5:42pm UTC](https://community.fireblocks.com/t/test-btc-transfer-issue-for-sandbox/1167/4 "2024-07-08T17:42:18Z")

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The estimated fee is 0.01113099572 for tx 267ed8b3-9511-4c74-b2c1-69f99a841ba8, and the wallet balance was 0.00378562 BTC\_TEST.  
The tx adbb5060-a12e-4314-b4f8-b7b4ff1c91e3 failed because the balance on Fireblocks is zero. Please update the balance and try again.

> **[Refresh asset balance data](https://developers.fireblocks.com/reference/updatevaultaccountassetbalance)**
>
> Updates the balance of a specific asset in a vault account. This API endpoint is subject to a strict rate limit. Should be used by clients in very specific scenarios.